any unsaturated aliphatic hydrocarbon with a carbon–carbon triple bond
b.
(as modifier)
alkyne series
Also called: acetylene
alkyne in American English
(ˈælˌkaɪn) or ˈalˌkine (ˈælˌkaɪn)
noun
any of a series of unsaturated open-chain hydrocarbons containing a triple bond and having the general formula CnH2n-2: these compounds are sometimes said to be in the acetylene series